550661986 has 32 divisors (see below), whose sum is σ = 963072000. Its totient is φ = 231254352.

The previous prime is 550661981. The next prime is 550661987. The reversal of 550661986 is 689166055.

It is not an unprimeable number, because it can be changed into a prime (550661981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312175 + ... + 313933.

It is an arithmetic number, because the mean of its divisors is an integer number (30096000).

Almost surely, 2^550661986 is an apocalyptic number.

550661986 is a deficient number, since it is larger than the sum of its proper divisors (412410014).

550661986 is a wasteful number, since it uses less digits than its factorization.

550661986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 550661986 is about 23466.1881437953. The cubic root of 550661986 is about 819.6498534804.

The spelling of 550661986 in words is "five hundred fifty million, six hundred sixty-one thousand, nine hundred eighty-six".